Type-writing machine.



N0. 848,316. PATBNTED MAR. 26, 1907. J. U. MCLAUGHLIN.

TYPE WRITING MACHINE.

APPLICATION FILED JULY13.1906.

UNITED STATES PATENT onnro JOHN C. MoLAUGHLIN,

on NEW YORK, N. .Y., A'SSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEWYORK, N. Y., CORPORATION OF NEW JERSEY;

TYPEQ'WRITING MACHINE.

Specification of v Letters Patent.

. ma a March 26, 1907.

Application filed July 13, 1906. Serial No. 32591.

To all whom it may c'oncerrt:

Be it known that 1, JOHN C.'MGLAUG HLI1 T,

- a citizen of the United States, residing in Manhattan borough, city ofNew York, in the county of New York and State of New York, A

the 'means which release the paper from the bite of the pressure-rollsand platen.

In the Underwood front-strike typewriting machine it iscustomary toprovide rolls beneath the platen for feeding the paper forwardly aroundand up in front of the platen and also to provide rolls to run upon thetop of the platen, the latter rolls .being independently adjustablealong the platen and also releasable independently of each other. Thelower rolls are releasable by means of a special key. For some classesof work it is frequently desired to release all of therolls, which isusually done by first depressing the key to release the bottom rolls andthen lifting the top rolls one at a time from the platen.

The object of my invention is to simplify the-operation of the rolls,and to this end I connect the top rolls to said release-key so as to bereleasable thereby at the same time provision for releasing the toprolls simultaneously by means of a finger-piece connected thereto, saidfinger-piece being preferably the same one that is used for connectingthe top rolls to the main release-key.

In the accompanying drawings, Figure 1 is a side elevation of one end orthe platenframe of an Underwood type-writing ma. chine provided with myimprovements, the top rolls being connected to the main releasekey, allthe parts being shown in normal positions. Fig. 2 is a View similar toFig. 1,

but showing the main release-key depressed so as to throw off thebottomrolls togetherwith the top rolls. Fig. 3 shows the top rollsdisconnected from the main release-key, but

arm forming part released from the platen by means of anotheriingerpiece, while the bottom rolls remain in normal positions againstthe platen. Fig. 4 is a perspective showingthe rolls all pressingagainst the platen, but with the top rolls disconnected Fig. 5 is aperspective of a rock shaft and of the mechanism for releasing the toprolls.

The cylindrical platen 1 is revolublyv mounted, by means of an axle 2,in a platenframe comprising ends 3, united by an in- 'clinedrear plateor paper-shelf 4. The latter slopes downwardly and forwardly in rear oftheplaten and curves up around'the same,

from the main release-key.

at 5, to form aguide for the paper-sheets.

Beneath the platen. are forward and rear rolls 6 7, controlled by arms89 projecting from a shaft 10. Upon theplaten-frame is mounted themainrelease-key 11, connected 14 to act upon arms 15, which control saidarms 8 9 in suchga manner .that

when the a link 12 to a rock-shaft 13, having cams key-11 is depressedthe arms-8 9 are forced away fromnthe'platen to release the rolls 6 7 yof the platen runv rolls Fig. 2. Upon the top 16 17, mounted uponalong-a rock-shaft 19,

frames 18, adjustable mounted in the ends 3 of the platen-frame; Each-ofthe frames 18 I may be turned up and back to throw the rolls 16 17 offthe platen-independently of the other frame. as the bottom rolls; butsuch connection I As so far described, the parts are in common use onsaid Underwood type-writing machine. Upon the end of the rock-shaft 19is secured, by means of a screw 20, a forwardlyextending arm 21, so thatby lifting said arm the shaft is rocked andboth rolls 16 and 17 arelifted from the platen. Upon said arm I mount a slide 22 having top andbottom clips 23 24 to catch upon the top and bottom edges of said arm21. The slide is held in position by the head of a screw 25,- threadedinto said arm 21 and passing through a slot 26 in the slide, the ends ofsaid slot limiting the shifting movements of the slideupon thearm 21.Extending upwardly from the slide is a finger-piece 27, whereby it maybe shifted. Whenthefinger-piece 27 is pulled forward, a notch 28, formedupon the front end of the slide '22, is engaged with an arm 29 ,whichprojects from a hub 30 of the lever 31, which carries the release-key11. When together said key 11 is depressed, the arm 29;, 'owing to itsengagement with the notch 28, lifts the front end of the slide andforces the same,

-16 and 117 from theiplatenat the same time the rolls 6 and 7arefjforced down from-the platen, so that all the rolls aresimultaneously a released; vAt the" Fig. positionthe cam.-

shaft l3.operates as usual to detainthe arms 8 9 in their releasepositions-thereby leav ingthe hands of the operator free'to mani u-.

late the paper,.and it will be understood t at owing to the connection,between the -top:- rolls and the main"release-key 11 said-top. rolls arelikewise; mechanically detained in release positions.

'.When the 'finger piece. 27

, is pressed back, the'slide' 22 becomes disconnected from themainrelease-key 11 Figs. 3

and 4, so that the bottom rolls may be released independently of the toprol s, while the latter may, of course, at anytime be releasedindependently of each other in the usual manner by turning the frames 18independently around the rod' 19.

The-slide 22 is 'detainedin eachof its -shifted positions by'means' of-aleaf-spring 32, which is fastened-by a screw 33 to the end 3 of theplaten-frame and bears down in either of two'notches or seats 34 and 35,formed upon the top of the slide. -.'I his spring also serves to pressdown the arm 21. and cause the rolls ltrand 17 to bear against theplaten, and it will be understoodthatthe finger-piece '27 may bepressed-backwardly, as shown at Fig. 3, to rock the shaft 19, "andthereby hit I both rollsl fi and '17. The bottom rolls'6 and v I -7 arepressed against the platen by the usual springs 36. 40

Variations may sccipe of the invention-1 aving thusdescribed'myinvention, I claim f 1,

1. In a type-writing machine, the combi nation with a platen, of rollsmounted to press separately upon the platenpa fingerpiece connected tomeans to release one of said rolls, and means for connecting the other.

I said rolls, and means for connecting said arm to said key, anddisconnecting it therefrom 1 at will, to enable said key either torelease the rolls together or to release one roll while the otherremainsin normal position against the platen. I 4

. 3. In a type-writing machine, the combination with a platen and rollsmounted to I with the arm 21, to rock upwardly,

thusrockingthe 'shaft 19 .and lifting the rolls a position to the latterto the-platen:

be resorted to within the bear separately thereon, of a 'key havingmeans to release one-oi said rolls, the other of 2 said rolls beingreleasable independently of said key, and a connectin devi ce'movable toconnect the ast mentioned roll to said key at will tobe'released'thereby,and also -movable to a position to disconnect thehasmentioned roll from said key, to enable be operated while thel'ast-mentioned roll remains in normal position against 4. Inatype-writing machine, the combiv.nation'with a, platen, ofrolls mountedto bear :sep arately against the I platen, a key for releasingyone of'said rolls, an arm for releasing the ot er of said'rolls, and a slidingdevice movableupon said arm from a position to connect said arm to saidkey, to a position to disconnectthe armirom the key.

'5. Ina typefwriting machine, the combination with a platen, of rollsmounted to bear separately against the platen, aikey for releasing oneof said-rolls, an arm for releasing the other of said ..roll s, asliding device upon said arm for connecting said arm to said key,

or disconnecting it therefrom at will, a finger piece upon said. slidingdevice for shifting the same, and a yielding. detent for retaining saidslide in difierent' positions. I

6. In a type-writing machine,. the combi nation with a platen, of rollsmounted to bear separately against the platen, a key'for releasing oneof said' rolls, an arm for releasing the other of said rolls, a slidingdevice upon said arm for connecting said arm to said key, ordisconnecting it therefrom at will, and a ielding detent for retainingsaid slide in diferent positions, said detent being constructed to bearupon said slide in a direction to 'pressthe roll against the platen.

7. In a type-writing machine, the com-bination with a' platen, of rollsmounted tobear separately against the platen, a key for releasing one ofsaid rolls, an arm for releasing the other of said rolls, a slidingdevice upon said arm for connecting said-arm to said key,

or disconnecting it therefrom at will, a fingerpiece upon'saidsliding'devicefor shifting the same, and a yielding detent for retainingsaid slide in different positions, said detent being when is'connectedfrom thefirst-mentioned release-key. v

' 8. In atyp'e-wr iting machine, the combination with a platen, andaroll pressing constructed to bear upon said slide in a direction topress the roll against the platen; said -fingeriece being'movable torelease its roll against the same, of a key for releasing said roll, arock-shaft, rolls mounted upon the rock-shaft and adjustable therealbng,an arm upon said rock-shaft, a slide upon said arm movable into and outof engagement with said release-key, a spring for retaining said sgde.in difi'ere'nt positions to which it is s ifted, said spring bearinguponsaid slide in a direction to press said adjustable rolls "shifted, saidspring bearing upon said slide in against the platen, and a finger-piecefor a direction to press said adjustable rolls shifting said slide.against the platen, and a finger-piece project- 9. In a type-Writingmachine, the combii ing from said slide for shifting the same, andnation 'With a platen, and a roll against the same, of a key forreleasing said roll, a rock-shaft; rolls mounted upon the rock-shaft andadjustable therealong, an arm upon said rock-shaft, a slide-upon saidarm movable into and out of engagement with said release-key, a springfor retaining said slide in difierent positions to which it is] thetension of said spring for lifting said'adjustable rolls from theplaten.

JOHN O.v MOLAUGHLIN.

Witnesses: I

KITTIE' FRANKFORT, JO N C. KQPF.

pressing also for rocking said shaft in opposition to

